package com.itheima.exception;

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Description:
 * @Version: V1.0
 */
//@Component
public class ExceptionResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest,
                                         HttpServletResponse httpServletResponse,
                                         Object o,
                                         Exception e) {

        System.out.println("myException is running..." + e.getClass());
        ModelAndView modelAndView = new ModelAndView();

        if (e instanceof NullPointerException ){
            modelAndView.addObject("msg","空指针异常");
        }else if (e instanceof ArithmeticException){
            modelAndView.addObject("msg","算数运算异常");
        }else{
            modelAndView.addObject("msg","未知的异常");
        }

        modelAndView.setViewName("error.jsp");
        return modelAndView;
    }
}
